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US4065326A - Electrical conductors of aluminum-based alloys and process for the manufacture thereof - Google Patents

Electrical conductors of aluminum-based alloys and process for the manufacture thereof Download PDF

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Publication number
US4065326A
US4065326A US05/691,010 US69101076A US4065326A US 4065326 A US4065326 A US 4065326A US 69101076 A US69101076 A US 69101076A US 4065326 A US4065326 A US 4065326A
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US
United States
Prior art keywords
temperature
aluminum
wire
tepid
artificial aging
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US05/691,010
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English (en)
Inventor
Jean-Claude Nicoud
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rio Tinto France SAS
Original Assignee
Societe de Vente de lAluminium Pechiney SA
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • H01B1/023—Alloys based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/05—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions

Definitions

  • This invention relates to the manufacture of conductor wires of Al-Mg-Si alloy intended for the production of bare overhead power cables. More precisely, the invention relates to a new method of producing wires which satisfy current requirements, this process affording a certain advantage over the prior art both from the economic point of view and also from the technical point of view.
  • the process according to the invention comprises the following steps: 1) a continuous quenching treatment carried out immediately after formation of the wire rod; 2) so-called tepid drawing; and 3) an artificial aging treatment carried out separately or continuously after the tepid drawing stage.
  • wires of aluminum alloy can be continuously produced by the process which is the subject of U.S. application Ser. No. 824,220, filed May 13, 1969, now U.S. Pat. No. 3,613,767, Oct. 19, 1971.
  • This process essentially comprises rapidly cooling the rod issuing from the rolling section to a temperature below about 240° C.
  • the present invention relates to an improved process for economically producing wires of Al-Mg-Si alloy having outstanding mechanical and electrical characteristics and intended for the manufacture of overhead power cables or more generally, for the production of bare or insulated cables of the kind used in electrical engineering.
  • the product of the invention may also be used with advantage for applications other than electrical applications, in particular, for mechanical applications.
  • the process comprises continuously producing a wire rod of Al-Mg-Si alloy by casting and rolling in a machine of the Properzi type, followed immediately at the output end of the last stand by rapid cooling to a temperature below the temperatures at which a significant precipitation hardening of Mg 2 Si takes place from a supersaturated solid solution, i.e. to a temperature below 200° C and preferably below 150° C.
  • the liquid metal entering the casting wheel at a temperature of approximately 700° C is at a temperature which can vary from 400° to 500° C, this latter temperature being substantially the temperature below which the solid solution obtained after solidification, in the case of sufficiently slow cooling, rejects magnesium and silicon.
  • the process according to the invention in a second stage, comprises carrying out so-called tepid deformation in a temperature range corresponding to the low precipitation rates.
  • the tepid drawing operation is carried out with wire rod in different ways, i.e. with a spool of cold wire, in which case the wire is cold on entering the drawing arrangement or, preferably, is gradually preheated to the tepid drawing temperature, or with a spool of wire preheated in a furnace to a temperature below the tepid drawing temperature and not exceeding 140° C, at which temperature a significant hardening effect is obtained, being reflected in reduced drawability.
  • One method of carrying out the tepid drawing operation comprises, for example, drawing the wire in a multiple-pass machine with in-line capstans and functioning by immersion, the bath of lubricant being thermostatically controlled to the tepid drawing temperature and the drawing die being sprayed with this same thermostatically controlled lubricant.
  • the wire is heat treated either in a static batch furnace at nominal temperatures in the range from 130° to 170° C for periods ranging from 30 minutes to 12 hours, or preferably continuously on leaving the tepid drawing arrangement at nominal temperatures in the range from 180° to 240° C over periods ranging from 1 to 30 seconds.
  • One way of carrying out a heat treatment such as this is, for example, to pass the wire continuously through an oil bath furnace which also makes it possible to obtain a wire which is perfectly lubricated and, hence, eminently suitable for the subsequent cable-forming operation.
  • This heat treatment has a recovering effect and also promotes precipitation hardening which is reflected in particular in an increase in electrical conductivity and a restoration of plasticity (elongation at break) and flexure whilst the mechanical strength of the wires (ultimate tensile strength) remains at a high level.
  • FIG. 1 and FIG. 2 diagrammatically illustrate the various processing stages from the liquid metal to the finished electrical cable in accordance with the prior art (conventional third process) and respectively in accordance with the invention.
  • FIG. 2 there are two variants, namely conventional artificial aging (in a static furnace) and continuous artificial aging.
  • FIG. 3 also diagrammatically illustrates the various processing stages in the form of a graph in which time is recorded on the abscissa on an arbitrary scale while temperature is recorded on the ordinate.
  • the axis of the ordinates and the three vertical parallel axes a, b, c determine three zones A, B, C which correspond respectively to the stages: production of the wire rod, treatment of the wire rod and final drawing/artificial aging.
  • the successive curve sections correspond to the following phases 1, 2, and 3: identical with the conventional processes.
  • the curve sections interrupted by double lines correspond, on the time scale, to non-determined time intervals such as spontaneous cooling processes or periods of waiting between successive stages.
  • the improvement in characteristics is very significant (increase of 2 kg/mm 2 in R, drop in resistivity).
  • aluminum base with the usual impurities for electrical applications was prepared, cast in a Properzi wheel, rolled at a temperature of 515° C on entering the mill and cooled to 60° C at the output end of the mill.
  • Example 2 was prepared, rolled under the same conditions as in Example 2 and then drawn partly in accordance with the prior art and partly in accordance with the invention (tepid drawing) to diameters of 3.0 mm and 2.0 mm with the following results which also show a very significant increase in R for otherwise the same characteristics.
  • Tepid (140° C) drawn wire of Example 2 was subjected to thermal artificial aging for fifteen seconds at 220° C by passage through an oil bath.
  • wires and cables obtained from them which have remarkable characteristics and which, in addition, benefit by the high resistance to corrosion of aluminum alloys in general and AGS in particular, may of course be used for any applications where these qualities are required, for example for wire fencing, braces for vines and fruit trees, and guys for masts or aerials.
  • alloys were cast in a Properzi wheel, rolled at a temperature of 515° C on entry into the mill and then cooled to 60° C at the output end of the mill.
  • the wire rod thus obtained was subjected to wire of alloy A, normal drawing to 3.45 mm; wire of alloy B, normal drawing to 3.45 mm and tepid drawing at 160° C to 3.45 mm.
  • Tepid drawing at 160° C was carried out in a four-pass drawing machine, the output rate amounting to 100 m/minute.
  • the wire enters the machine cold and is brought to the tepid drawing temperature by immersion in the bath of lubricant thermostatically controlled to that temperature, the dies and the heads of the drawing machine being themselves immersed in the lubricant.
  • the tepid drawn 3.45 mm diameter wire is obtained in two drawing operations under the following conditions.
  • the three 3.45 mm diameter wires obtained were then subjected to different artificial aging treatments in a static furnace.

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  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Conductive Materials (AREA)
  • Metal Extraction Processes (AREA)
  • Heat Treatment Of Nonferrous Metals Or Alloys (AREA)
  • Continuous Casting (AREA)
  • Metal Rolling (AREA)
US05/691,010 1975-05-28 1976-05-28 Electrical conductors of aluminum-based alloys and process for the manufacture thereof Expired - Lifetime US4065326A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR75.17202 1975-05-28
FR7517202A FR2342544A1 (fr) 1975-05-28 1975-05-28 Procede de fabrication de fils en alliage al-mg-si destines a la fabrication de cables aeriens de transport d'energie

Publications (1)

Publication Number Publication Date
US4065326A true US4065326A (en) 1977-12-27

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US05/691,010 Expired - Lifetime US4065326A (en) 1975-05-28 1976-05-28 Electrical conductors of aluminum-based alloys and process for the manufacture thereof

Country Status (27)

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US (1) US4065326A (xx)
JP (1) JPS527315A (xx)
AR (1) AR211124A1 (xx)
BE (1) BE842243A (xx)
BR (1) BR7603364A (xx)
CH (1) CH603267A5 (xx)
CU (1) CU34529A (xx)
DE (1) DE2623431A1 (xx)
DK (1) DK231376A (xx)
EG (1) EG12531A (xx)
ES (1) ES448261A1 (xx)
FI (1) FI761498A (xx)
FR (1) FR2342544A1 (xx)
GB (1) GB1533892A (xx)
IE (1) IE43712B1 (xx)
IL (1) IL49651A (xx)
IT (1) IT1070031B (xx)
LU (1) LU75034A1 (xx)
MY (1) MY8000278A (xx)
NL (1) NL7605813A (xx)
NO (1) NO761780L (xx)
OA (1) OA05336A (xx)
PH (1) PH11957A (xx)
PT (1) PT65146B (xx)
SE (1) SE7605978L (xx)
TR (1) TR18698A (xx)
ZA (1) ZA763146B (xx)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4161416A (en) * 1978-05-26 1979-07-17 Alcan Aluminum Corporation Production of aluminum wire
US4405385A (en) * 1978-12-14 1983-09-20 Societe Franco-Belge Des Laminoirs Et Trefileries D'anvers "Lamitreff" Process of treatment of a precipitation hardenable Al-Mg-Si-alloy
US5098490A (en) * 1990-10-05 1992-03-24 Shin Huu Super position aluminum alloy can stock manufacturing process
EP1201779A1 (de) * 2000-10-27 2002-05-02 Alcan Technology & Management AG Elektrischer Leiter aus einer Aluminiumlegierung
US20060283528A1 (en) * 2005-06-20 2006-12-21 Honeywell International, Inc. Aluminum alloys having a pre-determined electrical conductivity
CN102952976A (zh) * 2011-08-23 2013-03-06 东莞市东兴铝材制造有限公司 一种汽车冰箱用硼化铝合金及其制备工艺
US8999079B2 (en) 2010-09-08 2015-04-07 Alcoa, Inc. 6xxx aluminum alloys, and methods for producing the same
US9587298B2 (en) 2013-02-19 2017-03-07 Arconic Inc. Heat treatable aluminum alloys having magnesium and zinc and methods for producing the same
US20170092386A1 (en) * 2014-04-10 2017-03-30 Uacj Corporation Aluminum-alloy sheet for bus bar and manufacturing method thereof
US9926620B2 (en) 2012-03-07 2018-03-27 Arconic Inc. 2xxx aluminum alloys, and methods for producing the same
US10190196B2 (en) 2014-01-21 2019-01-29 Arconic Inc. 6XXX aluminum alloys
US20190292632A1 (en) * 2016-10-31 2019-09-26 Sumitomo Electric Industries, Ltd. Aluminum alloy wire, aluminum alloy strand wire, covered electrical wire, and terminal-equipped electrical wire
CN115354200A (zh) * 2022-10-20 2022-11-18 山东裕航特种合金装备有限公司 电池连接板用铝合金材料及其制备方法

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5587439A (en) * 1978-12-25 1980-07-02 Fujitsu Ltd Manufacture of semiconductor device
JPS55110753A (en) * 1979-02-20 1980-08-26 Furukawa Electric Co Ltd:The Aluminum alloy conductor and producing method of the same
JPS5662944A (en) * 1979-10-23 1981-05-29 Furukawa Electric Co Ltd:The Aluminum alloy conductor and its manufacture
JPS5839225B2 (ja) * 1979-11-28 1983-08-29 古河電気工業株式会社 高力アルミニウム合金導体の製造法
JPS56157026A (en) * 1980-05-08 1981-12-04 Nippon Telegr & Teleph Corp <Ntt> Formation of pattern
JPS57172739A (en) * 1981-04-17 1982-10-23 Toshiba Corp Pattern forming method
JPS5775440A (en) * 1980-10-28 1982-05-12 Toshiba Corp Manufacture of semiconductor device
LU83249A1 (fr) * 1981-03-23 1983-02-22 Huwaert Leo Cloostermans Procede de fabrication de fil machine en aluminium
JPS59107516A (ja) * 1982-12-13 1984-06-21 Nec Corp 半導体装置の製造方法
DE29619802U1 (de) * 1996-11-14 1997-01-09 Alcatel Alsthom Compagnie Générale d'Electricité, Paris Luftkabel mit zumindest einem im Verseilverband von elektrischen Leitern und zugfesten Tragelementen angeordneten Lichtwellenleiterelement
JP6643886B2 (ja) * 2015-12-09 2020-02-12 株式会社フジクラ アルミニウム合金導電線、これを用いた電線、ワイヤハーネス及びアルミニウム合金導電線の製造方法
JP7379879B2 (ja) 2019-06-21 2023-11-15 富士フイルムビジネスイノベーション株式会社 情報処理装置及びプログラム

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1695044A (en) * 1922-08-11 1928-12-11 Hallmann Karl Process for increasing the electrical conductivity and the flexibility of metals or alloys
US3266945A (en) * 1961-08-10 1966-08-16 Honsel Werke Ag Aluminum working procedure
FR1499266A (fr) * 1966-08-19 1967-10-27 Pechiney Prod Chimiques Sa Procédé de tréfilage des conducteurs électriques en alliages d'aluminiummagnésium-silicium
US3418177A (en) * 1965-10-14 1968-12-24 Olin Mathieson Process for preparing aluminum base alloys
US3464866A (en) * 1965-10-14 1969-09-02 Olin Mathieson Process for obtaining aluminum alloy conductors
US3613767A (en) * 1969-05-13 1971-10-19 Southwire Co Continuous casting and rolling of 6201 aluminum alloy
US3647565A (en) * 1970-04-01 1972-03-07 Southwire Co Method of the preparation of an insulated aluminum alloy magnet wire
US3706606A (en) * 1970-02-10 1972-12-19 L Esercizio Dell Inst Sperimen Thermomechanical treatment process for heat treatable aluminium alloys
US3770515A (en) * 1972-05-15 1973-11-06 F Besel High conductivity aluminum alloys
US3843418A (en) * 1970-07-23 1974-10-22 Sumitomo Chemical Co Aluminum alloys for electrical conductors and method thereof

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1695044A (en) * 1922-08-11 1928-12-11 Hallmann Karl Process for increasing the electrical conductivity and the flexibility of metals or alloys
US3266945A (en) * 1961-08-10 1966-08-16 Honsel Werke Ag Aluminum working procedure
US3418177A (en) * 1965-10-14 1968-12-24 Olin Mathieson Process for preparing aluminum base alloys
US3464866A (en) * 1965-10-14 1969-09-02 Olin Mathieson Process for obtaining aluminum alloy conductors
FR1499266A (fr) * 1966-08-19 1967-10-27 Pechiney Prod Chimiques Sa Procédé de tréfilage des conducteurs électriques en alliages d'aluminiummagnésium-silicium
US3613767A (en) * 1969-05-13 1971-10-19 Southwire Co Continuous casting and rolling of 6201 aluminum alloy
US3706606A (en) * 1970-02-10 1972-12-19 L Esercizio Dell Inst Sperimen Thermomechanical treatment process for heat treatable aluminium alloys
US3647565A (en) * 1970-04-01 1972-03-07 Southwire Co Method of the preparation of an insulated aluminum alloy magnet wire
US3843418A (en) * 1970-07-23 1974-10-22 Sumitomo Chemical Co Aluminum alloys for electrical conductors and method thereof
US3770515A (en) * 1972-05-15 1973-11-06 F Besel High conductivity aluminum alloys

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4161416A (en) * 1978-05-26 1979-07-17 Alcan Aluminum Corporation Production of aluminum wire
US4405385A (en) * 1978-12-14 1983-09-20 Societe Franco-Belge Des Laminoirs Et Trefileries D'anvers "Lamitreff" Process of treatment of a precipitation hardenable Al-Mg-Si-alloy
US5098490A (en) * 1990-10-05 1992-03-24 Shin Huu Super position aluminum alloy can stock manufacturing process
EP1201779A1 (de) * 2000-10-27 2002-05-02 Alcan Technology & Management AG Elektrischer Leiter aus einer Aluminiumlegierung
US20060283528A1 (en) * 2005-06-20 2006-12-21 Honeywell International, Inc. Aluminum alloys having a pre-determined electrical conductivity
US9249484B2 (en) 2010-09-08 2016-02-02 Alcoa Inc. 7XXX aluminum alloys, and methods for producing the same
US9359660B2 (en) 2010-09-08 2016-06-07 Alcoa Inc. 6XXX aluminum alloys, and methods for producing the same
US8999079B2 (en) 2010-09-08 2015-04-07 Alcoa, Inc. 6xxx aluminum alloys, and methods for producing the same
US9194028B2 (en) 2010-09-08 2015-11-24 Alcoa Inc. 2xxx aluminum alloys, and methods for producing the same
CN102952976A (zh) * 2011-08-23 2013-03-06 东莞市东兴铝材制造有限公司 一种汽车冰箱用硼化铝合金及其制备工艺
CN102952976B (zh) * 2011-08-23 2015-02-25 东莞市东兴铝业有限公司 一种汽车冰箱用硼化铝合金及其制备工艺
US9926620B2 (en) 2012-03-07 2018-03-27 Arconic Inc. 2xxx aluminum alloys, and methods for producing the same
US9587298B2 (en) 2013-02-19 2017-03-07 Arconic Inc. Heat treatable aluminum alloys having magnesium and zinc and methods for producing the same
US10190196B2 (en) 2014-01-21 2019-01-29 Arconic Inc. 6XXX aluminum alloys
US20170092386A1 (en) * 2014-04-10 2017-03-30 Uacj Corporation Aluminum-alloy sheet for bus bar and manufacturing method thereof
US10475547B2 (en) * 2014-04-10 2019-11-12 Uacj Corporation Aluminum-alloy sheet for bus bar and manufacturing method thereof
US20190292632A1 (en) * 2016-10-31 2019-09-26 Sumitomo Electric Industries, Ltd. Aluminum alloy wire, aluminum alloy strand wire, covered electrical wire, and terminal-equipped electrical wire
US10822676B2 (en) * 2016-10-31 2020-11-03 Sumitomo Electric Industries, Ltd. Aluminum alloy wire, aluminum alloy strand wire, covered electrical wire, and terminal-equipped electrical wire
CN115354200A (zh) * 2022-10-20 2022-11-18 山东裕航特种合金装备有限公司 电池连接板用铝合金材料及其制备方法
CN115354200B (zh) * 2022-10-20 2023-01-24 山东裕航特种合金装备有限公司 电池连接板用铝合金材料及其制备方法

Also Published As

Publication number Publication date
IL49651A0 (en) 1976-07-30
SE7605978L (sv) 1976-11-29
ES448261A1 (es) 1977-07-16
ZA763146B (en) 1977-07-27
IE43712B1 (en) 1981-05-06
IE43712L (en) 1976-11-28
IT1070031B (it) 1985-03-25
BR7603364A (pt) 1976-12-07
FR2342544B1 (xx) 1980-04-11
PH11957A (en) 1978-09-20
AR211124A1 (es) 1977-10-31
OA05336A (fr) 1981-02-28
PT65146B (fr) 1977-10-13
NO761780L (xx) 1976-11-30
GB1533892A (en) 1978-11-29
BE842243A (fr) 1976-11-26
NL7605813A (nl) 1976-11-30
EG12531A (en) 1979-03-31
FR2342544A1 (fr) 1977-09-23
CH603267A5 (xx) 1978-08-15
LU75034A1 (xx) 1977-02-15
JPS527315A (en) 1977-01-20
IL49651A (en) 1978-07-31
CU34529A (es) 1979-08-20
MY8000278A (en) 1980-12-31
PT65146A (fr) 1976-06-01
JPS5614144B2 (xx) 1981-04-02
DE2623431A1 (de) 1976-12-02
FI761498A (xx) 1976-11-29
DK231376A (da) 1976-11-29
TR18698A (tr) 1977-06-23

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